Typographical slug casting machine



Sept. 18, 1951 R. H. SCOTT ETAL 2,568,467

TYPOGRAPHICAL SLUG CASTING MACHINE Filed Sept. 25/1946 e Sheets-Sheet 1 p l951 R. H. SCOTT ETAL 2,568,467

TYPOGRAPHICAL SLUG CASTING MACHINE Filed Sept. 25, 1946 6 Sheets-Sheet 2 3 ml 1w I l l '1 l0 '0 s b .1951 R. H. SCOTT EVI'AL 23 3 7 TYPOGRAPHICAL SLUG CASTING MACHINE Filed Sept. 25', 1946 6 Sheets-Sheet 5 S P 1951 h R. H. SCOTT ETAL 2,563,467

TYPOGRAPHICAL SLUG CASTING MACHINE Filed Sept. 25, 1946 e Sheets-Sheet 4 p 1951 R. H. SCOTT ETAL 2,568,467

TYPOGRAPHICAL SLUG CASTING MACHI NE Filed Sept. 25, 1946 6 sheets sheet 5 A I V I M1 ll]! HHI H 4 nn W W mm lm lnm "/1 In Sept. 18, 1951 R. H. SCOTT EI'AL 2,568,467

TYPOGRAPHICAL SLUG- CASTING MACHINE Filed Sept. 25, 1946 63heets-Sheet-6 WWW mm Q H M n 1 v I hm ,Q .nmu

w w z? Patented Sept. 18, 1951 UNITED STATES PATENT OFFICE TYPOGRAPHICAL SLUG CASTING MACHINE Application September 25, 1946, Serial No. 699,308 In Great Britain September 26, 1945 Claims.

This invention relates to improvements in typographical slug casting machines of the kind known commercially under the registered trademark Linotype, wherein a composed line of matrices is presented to the face of a slotted mould, the mouthpiece of a metal pot presented against the rear face of the mould, and molten nicating mouthpiece into the mould, and it is an object of the invention to provide an improved metal pot construction in which the pumping mechanism may be removed for cleaning purposes. Another object of the invention is to provide an improved metal pot construction wherein the volume of air between the pump plunger and mouthpiece is reduced and a direct, smooth, feed of metal to the mouthpiece is obtained.

According to the present invention there is provided in or for a typographical slug casting machine a metal pot having a reciprocating pump plunger in a detachable pump plunger cylinder and means whereby the pump plunger cylinder is locked in position to communicate with a delivery mouthpiece and is unlocked to allow the pump plunger cylinder to be detached and re-- moved from the metal pot. The pump plunger may be disconnected from its operating means so that when the pump plunger cylinder is unlocked the pump plunger and pump plunger cylinder In one construction of metal pot according to the invention, the pump plunger cylinder is arranged in an inclined position and in line with a delivery throat connecting the pump plunger cylinder to the delivery mouthpiece, one end of the pump plunger cylinder being fitted into a seating formed in an extension of one end of the delivery throat. The pump plunger cylinder may be locked in position by cotter keys which engage between lugs on the outside of the pump plunger cylinder and slots formed in the extension of the delivery throat.

In an alternative construction of metal pot according to the invention, the pump plunger cylinder is provided with a flat seating which is detachably sealed and locked against a corresponding flat seating formed on a part of the metal pot communicating with the delivery :may be removed from the metal pot as a complete unit.

mouthpiece. The seating may be formed on a flange on the pump plunger cylinder, the lower portion of the flange being of wedge formation and fitted into correspondingly shaped slots in lugs fixed to the wall of the metalpot communicating with the delivery throat and mouthpiece. Preferably the flange is formed at one end of the pump plunger cylinder which is arranged in an inclined position and in line with the delivery throat and mouthpiece of the metal pot.

According to a further feature of the invention, the pump plunger cylinder communicates with the mouthpiece through a delivery throat comprising a plurality of throat sections which have been formed to correct shape out of solid metal, finished with a smooth surface on the inside and finally joined together to form the complete delivery throat.

In a further feature of the invention, the mouthpiece is provided in its front or mould-contacting face with a recess in which a porous metal tang is cast on bringing the mouthpiece into contact with a mould to cast a typographical slug. The mouthpiece may be formed with passages which on bringing the mouthpiece into contact with the mould connect the recess in the mouthpiece with recesses in the mould. Means may be provided for ejecting the metal tang from the recess and such ejecting means may be carried in the mouthpiece and operated by movement thereof into and out of contact with the mould.

The invention will be clearly understood from the following description of forms which the invention may assume and the description will be more readily followed by reference to the accompanying drawing wherein:

Figure 1 is a side elevation, partly in section, of the casting mechanism of a typographical slug casting machine embodying one form of the invention;

Figure 2 is a side elevation, partly in section, of the pump plunger cylinder and the means for looking it in position;

Figure 3 is a view similar to Figure 2, but showin the pump plunger cylinder unlocked and detached from its seating;

Figure 3a is a plan view of the metal pot shown in Figure 1, with the spring and cover removed;

Figure 4 is a side elevation, partly in section, of the casting mechanism of a typographical slug casting machine embodying an alternative form of the invention;

Figure 5 is a view showing the pump plunger cylinder and pump plunger according to Figure 4 removed from the metal pot;

Figure 6 is a view in section of the metal pot from which the pump plunger cylinder and pump plunger have been removed;

Figure '7 is a plan view of the metal pot shown in Figure;g l withji the' spring and gcover j removed;

Figure-8 *is" a sectional view take'n: on the line VIII-VIII of Figure '7 with the pump plunger removed;

Figure 9 is a front view of a metal. pot delivery throat according to the invention;

Figure 10 is a side elevation oitheithroat; 10

Figure 11 is a'plan view of th'e:throat;.; g Figure 12 is an enlargedis'ctional'viewyofiia metal pot mouthpiece, according to theprs'ent invention, in contact with a= mould.for .casting. .a H typographical slug; g V

Figure 13 is a view of the mouthpiece taken on the line XIII-XIII of Figure 12, and Figure 14 is a view of part of a typographical slug sliowing in-j d'ott'e'd ;lines=a part of ithe iporous irita'l tang 'which-wasicast ther'eonz-e rring to'F-igures 1 2 and- Sbfthe zdrawings, th etalfpo 1s m'o-rinte'd on'legsihndis'l-moved b' thecamfi -andicam ro'ller l on the lever 5. so to' b'ring the 'de'livery mouthpiece: 6 of. the nietal po-t into and-put of contact with the-mould I on them uld wheel'- {8-, In Figure: 1 ithe mouthe iiiecefi is an: contact with the mould 1 preparatory to the 'ca'sting" of- -a typographicalslug. The pumping mechanismwhereby molten metal is I?) ea-' thIQllgH -th 9* deliver y throat. 9-- to.- the 80 mo hpice G cOmpriSes a pumpplunger'cylinder I 'wli-ich'a pump "plunger 1 l -is 'reciproc'at'ed' by g 'ope'rated lever l2' connctd to-tlie pump p111 rj-ll b'y-a-lin l I3 lever 14: andlinkdi Tne cani-ieperateanever I Z niay e disconnected as from the lever M by removing'the stud' l 6; When the stud fliis=-refnoved; the; link l 3 is turned about thestiid '-l T and the hole-l 8 as *brq a ht into align- Iflh't \N'Fith'13111-3 11016 I 91afid' thestfidilfi inlsertd tl'ierebetweenl Tlie link 'l3-"rr'1faythen b e-use'd a handle-f "removing the pumping mechanism a fitrtlie pump prurjrger cyimder I 0*l1a's been unlocked and- Z detached by the means 'about' to be d 'c'ribed; The lverl4 ismountedo'rl a tubular s 'ftfi-iii c'arrie' d bya withdrawableslfa ft '2 l (see Fi ure 3a) barmgs zzeformed the side walls idf'tlferfital'fpot; The shaft is p'rovidediwith a s op meniber-"ZB" 'ich; in-the*normally=' retiaet position of je-pum plunger; is held against a bearing? 2 1037 means of a spring '2 4.

-Tl ie pump plunger-cylinder I0 is t'aperedat theendas at 25 (Figure 3) to'fit into a-'corre- "spondirigly shaped sating 2'6 (Figure 1) 1 formed in an 2 extension 21 of wi -delivery tl'noa-t 9 attachd 'to thefront wall or "trre-"mean pot... The extension 2 T-is 'so formed" that when the tapered 2'5 is -fitted into the seating-- 2'B' 'thepump plunger cylinder 10 is in an inclinedipo'sition andinline-with thedelivery throat9 %ind 1nouthpieces;- The extension ll fis provid'clwithpairs 760 of lugs 28 and 29, the lower a'i'r'oi lugs ZQ' being longer. than the upper 'pair 'o'f lugs=28 inorder to formiiguideirestsr for lugss301on .eitherxside "of .the pump plunger cylinder whenithextapered 'end .2'5

is: 'heirig:. fitted ;into" or :be'ingdetaclied from the inder I0 is locked in position bm'cogtterilceys 3'2 which Eareinserted inzslotsr; 28a and 29a in lugs 28 andgZQ to engage-the-lugs30 on the pump plunger cylinder.

inder (after removing the metal pot cover la), 7

member 332. on the pumpgplungerfcylinder engages the tubular shaft 20. If desired, the enp agement of the member 33 with the tubular In the alternative construction shown" in Figures i -to'S, the pump plunger cylinder H! is provided at one end with a flange 34 having a flat satingeBd-(Figure 5 whichz-is detachably sealed and: locked a-gainst1a corresponding; .flat seating 3$:(Figure;6 )gformed on the insideyof the;.;fro nt wall of jtheo metal pot.communicatinggwithmhe deliveryithroat and mouthpiece.=6. v ThedQWer portionofrthecflange 34 is: formedwith wedge: shaped parts: 3-? (Figure .5) WhiChflfit'illitO'gCOIILQ? spondingly, shapedxslots $38 (Figure 6) in ;lugs --39 fixed' to thejmetal pot. The.upperrportiongofzthe flange, 34,. is;providedx witlira bolt. 4Q slidably mounted therein and fitted with a nut having tommy-holesfih I 1 The :pnmp phlngerz cylinder Weiss-secured .to-oa bracket .t provided withrbea-rin s; 22a,;(Fignrev7g carrying; a shafttZ mach"; which: the :lever Mr is mounted. Thesbracketedfiiissproyided:withiaistop M against ,,Whi0h'1 a s'crew iiiipirr .the;-.lever: ,boss l to; and dimpled'iinto: shaftrnagais heldibyra spring, 2 4" in the retracted; positionzofzzthee pump plunger II V (Figurjes4)..; .Thegz'springii lg iSzaOOIlinected betweenttheslever Th1and.the:fiangte :34f

= Togsattac-h :and locks thee-pump; plungerzcyl-mder As 5 the; flangei 34:", is .zhein'gi inserted": ddwnwardly between -the-;:guides-. :26 the bolt-:40 :enterszazslot 4*1 in thefront lwa'll' offthe'imetalzpotr. .A-=peg f4 Oil prevents: turning. o'fs-the: bolt. Aiterzthe: wedge;-

shaped; partssfi lI'ha-ve beenwpushect home in:.the

slots: 38:50, that theaseating; 35=1is IDIGSSdJISJIld sealed .aga-il'istzthe seatingflfie .the:.-p.ump pl unger "cylinder Iii:is;-fi'nally-;locked rinyppsitiona'byr .irig;the nut-241'. I Tocunlockyandrdetachitheapunip plungerrcylinder: 'l 0", the nutr'4 l iiSilGDSBIldiffiIId the flange 3 is drawn upwardly to removezflm pumpiplunger; cylinder and :pumping": mechanism fromtheemetalpotn g Referringzto; Figurest rlto :11; theidelivermthrdat 91iisxfirst made :in atxvlossections. 48 and; 495 Whih "have: been formedito 'correct:shapeedutsofz solid metal; ,The iinnerssurfacesiafli of; thBiSBCtiOIlSsfQB and I49 are machined to; axsmooth finish sora'sat'o provide surfaces-which1ensur'eanunimpeded fi6w of: molten: metal :jdirectly to the; mouthpiece-('5. The; inner: edges of the; sectionsgtl 8;: and: 49mm bevellediassaatlii When: theiinner; edgesiofg the sections 48 and 49 are placed togetheryazvshaped roove .:extending=i longitudinally; of). the; throat and :along the;upperfsidethereof, :isifoflfiedia-nd a similar;:-groov e is I'fOI-IXIGd'-;&1OI1-lj the underside thereof; The ,;sections: 4 8') and; 49:3 areweldedm- .siether :alonglthese grooves.- to: form..the-- comnlete delivery th'roat-19:, .1;

The mouthpiece 6 is provided in its front or mould-contacting face with a recess 52 (see Figures 12 and 13) in which a porous metal tang 53 (Figure 14) is cast on bringing the mouthpiece 6 into contact with the mould I to cast a typographical slug. The recess 52 connects with vent nicks or passages 54 in the mouthpiece and on bringing the mouthpiece into contact with the mould the passages 54 connect with the recesses 55 which are provided in the mould for casting a' ribbed typographical slug (Figure 14). When molten metal is pumped intothe mould, air from the delivery throat and the mould is forced away from the face or matrix-side oi the mouldtorise through the passages 54 into the recess 52. As solidification of the molten metal occurs very quickly on contacting with the cold matrices, the face of the typographical slug will be free from air holes. The last portion of metal to solidify is the metal tang 53, and as air has been driven away from the face of the mould and has risen into the recess 52 the metal tang 53 is of a porous nature.

The metal tang 53 is ejected from the recess 52 by a number of ejector rods 56 passing freely through the mouthpiece 6 (Figure'12). The ejector rods 56 are normally spring-pressed into the recess 52 by springs 51 extending between the front wall of the metal pot and collars 58 on the ejector rods. The ejector rods 56 pass freely through a plate 59 which is pivotally mounted behind the mouthpiece 6 and has an adjustable stud 60. When the metal pot is moved to bring the mouthpiece 6 into contact with the mould I, the stud 60 contacts with the mould wheel 8 and causes the plate 59 to bear against the collars 58 to withdraw the ejector rods 56 from the recess 52 (as shown in Figure 12).

After casting, the metal pot and mouthpiece move away from the mould 1 and mould wheel 8 and the plate 59 assumes a vertical position, tending to move away from the collars 58, and allows the springs 51 to press the ejector rods 56 into the recess 52 and eject the metal tang 53. The metal tang 53 is removed from the typographical slug during the usual trimming operation and the slug is subsequently ejected from the mould.

Having described our invention, we declare that what we claim and desire to secure by Letters Patent is:

1. In or for a typographical slug casting machine the combination of a metal pot, a reciprocating pump plunger, means for operating the pump plunger, connecting means between the pump plunger and the operating means, means for disconnecting the connecting means from the operating means, a detachable pump plunger cylinder, a delivery mouthpiece, means whereby the pump plunger cylinder is locked in position to communicate with the delivery mouthpiece and is unlocked to allow the pump plunger cylinder to be removed from the metal pot, and engaging means carried by the pump plunger cylinder adapted to engage with the connecting means when the pump plunger cylinder is unlocked.

2. In or for a typographical slug casting machine the combination of a metal pot, a recipro-l cating pump plunger, means for operating the pump plunger, a delivery throat, a delivery mouthpiece attached to one end of the delivery throat, an extension secured to the other end of the delivery throat, a seating formed in the extension, a detachable pump plunger cylinder arranged in an inclined position in line with the delivery throat and having one end tapered to fit into the correspondingly shaped seating formed in the extension, and removable cotter keys which engage between lugs on the outside or the pump plunger cylinder and recesses formed in extensions 01' the delivery throat. 1

3. In or for a typographical slug casting mapump plunger, a detachable pump plunger cylinder, a delivery mouthpiece, a delivery throat connecting the delivery mouthpiece to the front wall of the metal pot, a flange on the pump plunger cylinder, a flat seating formed on said flange, a wedge-shaped lower portion formed on said flange, lugs fixed to the wall of the metal pot having slots shaped to correspond to the wedgeshaped lower portion and into which slots the.

wedge-shaped portion is fitted, a flat seating formed on the inside of the front wall of the metal,

pot communicating with the delivery throat and means whereby said seatings are detachably sealed together.

5. In or for a typographical slug casting machine the combination of a metal pot, a reciprocating pump plunger, means for operating the pump plunger, a detachable pump plunger cylinder, a delivery mouthpiece, a delivery throat connecting the delivery mouthpiece to the front wall of the metal pot, a flange on the pump plunger cylinder, a fiat seating formed on said flange, a wedge-shaped lower portion formed on said flange, lugs fixed to the wall of the metal pot having slots shaped to correspond to the wedgeshaped lower portion and into which slots the wedge-shaped portion is fitted, a flat seating formed on the inside of the front wall of the metal pot communicating with the delivery throat, and an upper portion of said flange provided with a nut and bolt slidably mounted therein and arranged so that when the lower portion of the flange is fitted into the slots in the lugs the bolt is dropped into a slot formed in the front wall of the metal pot and the nut is turned to seal said seatings together.

6. In or for a typographical slug casting machine the combination of a metal pot, a reciprocating pump plunger, means for operating the pump plunger, a detachable pump plunger cylinder, a delivery mouthpiece, a tubular shaft on which the means for operating the pump plunger is mounted, bearings in the side walls of the metal pot, and a withdrawable shaft carried in said bearings and supporting th tubular shaft.

'7. In or for a typographical slug casting ma-- chine the combination of a metal pot. a reciprocating pump plunger, means for operating the pump plunger, a. pump plunger cylinder, a delivery mouthpiece communicating with the pump plunger cylinder and being provided in its mould contacting face with an open tang casting recess to communicate with the mould cavity and ar ranged to be closed by the mould, means for mov ing the metal pot to bring the delivery mouthpiece into and out of contact with a mould to cast a typographical slug in the mould, springpressed ejector rods passing freely through the mouthpiece so as to enter the recess, collars on the ejector rods, a plate pivotally mounted behind the mouthpiece and arranged to bear against the collars on the spring-pressed ejector rode 

